Amasias
Amasia (English Amasia) is a possible future supercontinent , which is formed by the connection of the existing continents Asia and North America . The connection point in this model is between Siberia and Alaska .
theory
The theory assumes that Siberia, which is the connection between the Eurasian and North American plates, continues to behave statically, as it has for the past million years. America and Asia will push together over the North Pole in a forecast 100 million years and the Arctic Ocean will disappear. Also, Africa and Australia drifting northward until they also join the amasischen continent. In 250 million years there will be a world with only two continents, Amasia and Antarctica .
Other theories of a supercontinent
While Ronald Blakeley's theory assumes that the Atlantic is expanding, Christopher Scotese suspects that a subduction zone will form on the eastern edge of North America , causing the Atlantic to close again and America to stick to Africa or Eurasia in 250 million years. Scotese ignores, however, that in the case of a subduction zone on the US east coast, the speed of the ocean floor spreading of the Atlantic Ridge would increase.
A similar scenario to Amasia was also described by Roy Livermore with Novopangea in the late 1990s.
What all theories have in common is the drying up of the Mediterranean through the subduction of the ocean crust of the African plate under Europe in the course of the Alpine orogeny , which will shift Europe to the north and form a new mountain range.
See also
Individual evidence
- ↑ "Amasien": The next supercontinent. In: orf.at. February 9, 2012, accessed on July 19, 2020 (German).
- ↑ Caroline Williams, Ted Nield: Pangea, the comeback . In: NewScientist , October 20, 2007. Retrieved August 28, 2009.